There is no evidence-based annual cleaning schedule that applies to every home. EPA says routine air duct cleaning has not been shown to prevent health problems or improve air quality for the general population. The condition of the system—not the calendar—should guide the decision.
What may warrant an inspection?
EPA identifies substantial visible mold growth inside hard-surface ducts or HVAC components, vermin inside the ductwork, and excessive dust or debris released into the home from supply registers as reasons to consider cleaning. Ask the professional to show you the evidence and explain the scope before authorizing work.
Fix related problems first
A dirty filter, a disconnected return, moisture, pest entry, or damaged ductwork may be the underlying issue. Cleaning alone will not repair those conditions. EPA advises correcting moisture sources; wet or moldy insulation inside ducts cannot be effectively cleaned and may need replacement.
Hampton Roads homes vary by age, layout, pets, renovation history, and crawl-space or attic conditions. Coastal location alone does not prove that a home needs annual cleaning. Homeowners in Larchmont, Kempsville, and Great Bridge can use an inspection to document the system before choosing a service.
Read the EPA's duct-cleaning criteria, then request a photo inspection if you see a condition that may warrant one.